题目

Do you wake up every day feeling too tired, or even upset? If so, then a new alarm clock could be just for you. The clock, called SleepSmart, measures your sleep cycle, and waits  1  you to be in your lightest phase(stage)of sleep  2  rousing（waking）you. Its makers say that should   3  you wake up feeling refreshed every morning. As you sleep you pass   4  a sequence of sleep states-light sleep, deep sleep and REM(rapid eye movement) sleep-that  5  approximately every 90 minutes. The point in that cycle at which you wake can   6  how you feel later, and may   7  have a greater impact than how much or little you have slept. Being roused during a light phase   8  you are more likely to wake up energetic. SleepSmart   9  the distinct pattern of brain waves  10  during each phase of sleep, via a headband equipped   11  electrodes（电极）and a microprocessor. This measures the electrical activity of the wearer’s brain, in much the   12  way as some machines used for medical and research   13  , and communicates wirelessly with a clock unit near the bed. You   14  the clock with the latest time at  15  you want to be wakened, and it  16  duly（适时地）wakes you during the last light sleep phase before that. The  17  was invented by a group of students at Brown University in Rhode Island  18  a friend complained of waking up tired and performing poorly on a test, “  19  sleep-deprived（被剥夺）people ourselves, we started thinking of   20  to do about it, ” says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea. 1．A．beside                   B．near                    C．for                      D．around 2．A．upon                     B．before                 C．towards              D．till 3．A．ensure                  B．force                   C．require                D．request 4．A．through                 B．into                     C．about                  D．on 5．A．shows                  B．changes               C．begins                 D．repeats 6．A．effect                   B．affect                  C．reflect                 D．perfect 7．A．already                  B．ever                    C．never                  D．even 8．A．means                   B．marks                 C．says                    D．narrates 9．A．removes                B．makes                 C．records               D．recalls 10．A．proceeded           B．produced             C．pronounced D．progressed 11．A．  by                     B．of                       C．with                    D．over 1,3,5   12．A．familiar               B．similar                 C．different              D．same 13．A．findings               B．achievements       C．proposals            D．purposes 14．A．prompt                B．program              C．design                 D．plan 15．A．where                 B．this                     C．which                 D．that 16．A．then                    B．also                     C．almost                 D．yet 17．A．claim                  B．conclusion           C．concept               D．explanation 18．A．once                   B．after                    C．since                   D．while 19．A．Besides               B．Despite                C．To                      D．As 20．A．what                B．how                       C．whether          D．when 答案： 1—5  CBAAD    6—10  BDACB    11—15  CDDBC    16—20  ACBDA

查看本题答案和解析